gha: bump the github-actions group with 2 updates #672

Job	Run time
sync / sync	55s
check / Check for zero-width space characters	7s
check / Build docs (latex)	6m 22s
check / Build docs (epub)	6m 0s
check / Build docs (html)	6m 8s
check / Lint translations	34s
check / Build docs (pdf)	0s
	20m 6s

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